Hello everyone, I already briefly mentioned in my introduction post that my wife and I have big building plans, which we hope to finally realize within the next few years. I don’t know anyone in my close circle of friends who is building a house, so I’m hoping to get some help here, as I naturally have a thousand questions about various topics! Currently, we are focusing a lot on how we want to heat our home and have quickly agreed that we want a heat pump for both heating and domestic hot water. I find the topic very complex, but if I understand correctly, a heat pump mainly uses renewable environmental energy, but also consumes a small amount of electricity. That’s why we would like to combine it with a photovoltaic system. Does anyone here have experience with this and can share their insights? Do you think this is a good idea? I would be grateful for any input!
Fuchur schrieb:
The difference is as follows:
An air-to-air heat pump extracts heat from the air (outside air or exhaust air) and transfers it to the interior rooms through ventilation. Underfloor heating or radiators are not required.
An air-to-water heat pump transfers the heat from the air to a heating circuit with underfloor heating or radiators.
.Ah, got it. Thanks for the explanation! As I said, I was originally talking about an air-to-air heat pump, but if I understand correctly, I actually need the other type if I want underfloor heating? Underfloor heating is always very comfortable.
Hirscherlo schrieb:
But I would also recommend that if you want to do more research, you should visit a showroom like Vaillant, where you can see all the devices and also hear how loud they are. Alternatively, you can visit a building fair, where you will surely find something and get information. You’ll have to check if there will be one near you soon.The idea of the showroom is good; as a layperson, it’s really hard to imagine what it actually looks like. We had already planned to go to a fair anyway, not just for heat pumps—it’s useful for other things too, since as a beginner you have many questions about different areas. Thanks!
Hirscherlo31 Dec 2018 14:46I always emphasize the maintenance contract because it provides excellent protection. Make sure to have it explained to you in good time so you understand all the benefits included. I think it’s great that you can get an appointment very quickly if something breaks down, plus you get discounts if repairs are needed, which can happen sometimes. That would be my last good tip!
In any case, I wish everyone a great start to the new year today!
In any case, I wish everyone a great start to the new year today!
Has anyone ever considered a combined solution, like an exhaust air-to-water heat pump such as the NIBE730?
Air-to-water heat pump with cross-flow heat exchanger
In this system, the exhaust air releases most of its energy to the incoming fresh air through a cross counter-flow heat exchanger before being expelled outside. Depending on the heating demand, it then flows over the surface of the air-to-water heat pump evaporator. There, it transfers the remaining heat to the heat pump’s refrigeration cycle. If additional energy is needed for space heating or domestic hot water production, it is drawn from the outdoor air supplied to the heat pump.
Air-to-water heat pump with cross-flow heat exchanger
In this system, the exhaust air releases most of its energy to the incoming fresh air through a cross counter-flow heat exchanger before being expelled outside. Depending on the heating demand, it then flows over the surface of the air-to-water heat pump evaporator. There, it transfers the remaining heat to the heat pump’s refrigeration cycle. If additional energy is needed for space heating or domestic hot water production, it is drawn from the outdoor air supplied to the heat pump.
Hi,
an exhaust air heat pump might still make sense in a passive house. Otherwise, it’s basically a money pit, since in a typical house it is almost like direct electric heating for physical reasons.
Considering that the exhaust air almost contains no residual heat after the cross-flow heat exchanger, it should be clear that the heat can only be pumped from the outside air temperature level. In that case, it has no advantages over a regular air source heat pump. Also, I’m put off by the fact that this heat pump does not appear in the seasonal performance factor (SPF) calculators. The data sheet values are not very convincing either.
Regarding maintenance contracts:
If an air source heat pump is installed correctly, there is usually no real need for maintenance. Therefore, the contract can mostly be seen as additional insurance. You have warranty anyway for the first few years. If the heat pump lasts through this period, the likelihood is high that it will continue to operate well in the following years, provided it is used correctly.
Regards,
gnika77
an exhaust air heat pump might still make sense in a passive house. Otherwise, it’s basically a money pit, since in a typical house it is almost like direct electric heating for physical reasons.
Considering that the exhaust air almost contains no residual heat after the cross-flow heat exchanger, it should be clear that the heat can only be pumped from the outside air temperature level. In that case, it has no advantages over a regular air source heat pump. Also, I’m put off by the fact that this heat pump does not appear in the seasonal performance factor (SPF) calculators. The data sheet values are not very convincing either.
Regarding maintenance contracts:
If an air source heat pump is installed correctly, there is usually no real need for maintenance. Therefore, the contract can mostly be seen as additional insurance. You have warranty anyway for the first few years. If the heat pump lasts through this period, the likelihood is high that it will continue to operate well in the following years, provided it is used correctly.
Regards,
gnika77
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